The US government lost its last triple-A credit score from a major international ratings firm after a downgrade by Moody’s Investors Service on May 16, in a bleak milestone for the world’s largest economy.

Moody's on Friday downgraded the credit rating of the United States by a notch to "Aa1" from "Aaa", citing rising debt and interest "that are significantly higher than similarly rated sovereigns." U.S.

The US lost its triple-A credit score with Moody's on Friday, with the credit ratings firm citing rising federal debt and interest costs. The US was downgraded from Aaa, the highest rating, to Aa1. Some sovereigns with an Aaa ratings from Moody's include the European Union,